has anyone ever replace their own oil cooler? i went in today to get my 80k scheduled maintanence done, and there is a leak in my oil cooler. this is allowing oil into my coolant hoses and into the resevior, so i cant drive it until it is repaired. i trust my mechanic so i dont want to go anywhere else; but he cant get to it until next wednesday. the part is on order and will arrive on monday. i was wondering how possible this job is to do myself when the part arrives. any help would be appreciated. thanks